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使用小型棱镜摄谱仪半定量分析光谱的简便方法 被引量:3
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作者 赵辉 石恒用 +1 位作者 赵新 常效奇 《大学物理》 北大核心 2001年第5期29-30,共2页
介绍了借助CCD工业摄象机 ,使用小型棱镜摄谱仪拍摄光谱及在微型计算机上制作标准铁谱和处理光谱的方法 .这种方法的采用使我们不必每次都拍摄铁谱 。
关键词 棱镜摄谱仪 光谱分析 CCD工业摄像机 半定量分析 标准铁谱
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FeCl_3溶液的微波等离子体炬光谱摄谱特点
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作者 黄孝华 《中国计量学院学报》 1995年第1期51-55,共5页
铁谱作为其他元素光谱的标识光谱,在摄谱法元素分析中占有重要地位.为了研究近年新研制出的微波等离子体炬的开发前景,我们用它作为激发光源,对FaCl3溶液进行摄谱研究.通过改变等离子体气流量、微波入射功率、焰炬上摄谱高度... 铁谱作为其他元素光谱的标识光谱,在摄谱法元素分析中占有重要地位.为了研究近年新研制出的微波等离子体炬的开发前景,我们用它作为激发光源,对FaCl3溶液进行摄谱研究.通过改变等离子体气流量、微波入射功率、焰炬上摄谱高度、曝光时间等条件,获取了具有对比性的谱板.对摄谱结果进行分析,本文总结出对FnCl3溶液较适宜的微波等离子体炬摄谱条件. 展开更多
关键词 微波等离子体炬 标准铁谱 FeCl3溶液发射光谱 摄谱条件
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Analysis of external noise spectrum of high-speed railway 被引量:10
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作者 邓永权 肖新标 +1 位作者 何宾 金学松 《Journal of Central South University》 SCIE EI CAS 2014年第12期4753-4761,共9页
A schematic to make the spectra of the exterior noise of high speed railway was put forward. The exterior noise spectrum was defined based on the characteristics of the high-speed train exterior noise. Its characteris... A schematic to make the spectra of the exterior noise of high speed railway was put forward. The exterior noise spectrum was defined based on the characteristics of the high-speed train exterior noise. Its characteristics considered here include identifying the exterior main sources and their locations, their frequency components including the Doppler effect due to the noise sources moving at high speed, the sound field intensity around the train in high-speed operation, the sound radiation path out of the train, and the pressure level and frequency components of the noise at the measuring points specified by the International Organization for Standardization(ISO). The characteristics of the high-speed train exterior noise of the high speed railways in operation were introduced. The advanced measuring systems and their principles for clearly indentifying the exterior noise sources were discussed in detail. Based on the concerned noise results measured at sites, a prediction model was developed to calculate the sound level and the characteristics of the exterior noise at any point where it is difficult to measure and to help to make the exterior noise spectrums. This model was also verified with the test results. The verification shows that there is a good agreement between the theoretical and experimental results. 展开更多
关键词 high-speed train noise sound source identification noise control noise spectrum
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